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I present herewith a photograph of a vaginal speculum which I have recently invented. The instrument is similar to Graves' in the mechanism for the vertical expansion of the blades, but has the following improved features. Instead of the screw used in most similar instruments to keep the distal ends of the blades expanded, I have adopted a ratchet and pawl mechanism, which permits the operator to expose the cervix uteri very quickly, and adjust the instrument with one hand, and to release the blades as quickly when he desires to remove the instrument.
Another improvement is a funnel-shaped opening at the rear portion of the lower blade leading into a hollow shank on same, to which a piece of rubber tubing is affixed, thus providing a ready outlet for fluids while using the speculum.
The instrument is aseptible, and the lower blade can be detached and used as a Sims
FOX GR. A VAGINAL SPECULUM.. JAMA. 1897;XXIX(3):143. doi:10.1001/jama.1897.02440290037021b